Question: On June 30th, 2017, what was the population of Katowice?
Paraphrase: What was the population size in Katowice on June 30, 2017?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q588 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'2017')) }